<template>
  <BasicModal
    width="800px"
    :title="t('component.upload.upload')"
    :okText="t('component.upload.save')"
    v-bind="$attrs"
    @register="register"
    @ok="handleOk"
    :closeFunc="handleCloseFunc"
    :maskClosable="false"
    :keyboard="false"
    class="upload-modal"
    :okButtonProps="getOkButtonProps"
    :cancelButtonProps="{ disabled: isUploadingRef }"
  >
    <template #centerFooter>
      <a-button @click="handleStartUpload" color="success" :disabled="!getIsSelectFile" :loading="isUploadingRef">
        {{ getUploadBtnText }}
      </a-button>
    </template>

    <div class="upload-modal-toolbar">
      <Alert :message="getHelpText" type="info" banner class="upload-modal-toolbar__text" />

      <Upload
        :accept="getStringAccept"
        :multiple="multiple"
        :before-upload="beforeUpload"
        :show-upload-list="false"
        class="upload-modal-toolbar__btn"
      >
        <a-button type="primary">
          {{ t('component.upload.choose') }}
        </a-button>
      </Upload>
    </div>
    <FileList :dataSource="fileListRef" :columns="columns" :actionColumn="actionColumn" />
  </BasicModal>
</template>
<script lang="ts" setup>
import { ref, toRefs, unref, computed } from 'vue'
import { Upload, Alert } from 'ant-design-vue'
import { BasicModal, useModalInner } from '@/components/Modal'
import { useUploadType } from './useUpload'
import { useMessage } from '@/hooks/web/useMessage'
import { FileItem, UploadResultStatus } from './typing'
import { basicProps } from './props'
import { createTableColumns, createActionColumn } from './data'
import { checkImgType, getBase64WithFile } from './helper'
import { buildUUID } from '@/utils/uuid'
import { isFunction } from '@/utils/is'
import { warn } from '@/utils/log'
import FileList from './FileList.vue'
import { useI18n } from '@/hooks/web/useI18n'

const props = defineProps({
  ...basicProps,
  previewFileList: {
    type: Array as PropType<string[]>,
    default: () => []
  }
})
const emit = defineEmits(['change', 'register', 'delete'])

const columns = createTableColumns() as any[]
const actionColumn = createActionColumn(handleRemove) as any

//   是否正在上传
const isUploadingRef = ref(false)
const fileListRef = ref<FileItem[]>([])
const { accept, helpText, maxNumber, maxSize } = toRefs(props)

const { t } = useI18n()
const [register, { closeModal }] = useModalInner()

const { getStringAccept, getHelpText } = useUploadType({
  acceptRef: accept,
  helpTextRef: helpText,
  maxNumberRef: maxNumber,
  maxSizeRef: maxSize
})

const { createMessage } = useMessage()

const getIsSelectFile = computed(() => {
  return fileListRef.value.length > 0 && !fileListRef.value.every((item) => item.status === UploadResultStatus.SUCCESS)
})

const getOkButtonProps = computed(() => {
  const someSuccess = fileListRef.value.some((item) => item.status === UploadResultStatus.SUCCESS)
  return {
    disabled: isUploadingRef.value || fileListRef.value.length === 0 || !someSuccess
  }
})

const getUploadBtnText = computed(() => {
  const someError = fileListRef.value.some((item) => item.status === UploadResultStatus.ERROR)
  return isUploadingRef.value
    ? t('component.upload.uploading')
    : someError
    ? t('component.upload.reUploadFailed')
    : t('component.upload.startUpload')
})

// 上传前校验
function beforeUpload(file: File) {
  const { size, name } = file
  const { maxSize } = props
  // 设置最大值，则判断
  if (maxSize && file.size / 1024 / 1024 >= maxSize) {
    createMessage.error(t('component.upload.maxSizeMultiple', [maxSize]))
    return false
  }

  const commonItem = {
    uuid: buildUUID(),
    file,
    size,
    name,
    percent: 0,
    type: name.split('.').pop()
  }
  // 生成图片缩略图
  if (checkImgType(file)) {
    // beforeUpload，如果异步会调用自带上传方法
    // file.thumbUrl = await getBase64(file);
    getBase64WithFile(file).then(({ result: thumbUrl }) => {
      fileListRef.value = [
        ...unref(fileListRef),
        {
          thumbUrl,
          ...commonItem
        }
      ]
    })
  } else {
    fileListRef.value = [...unref(fileListRef), commonItem]
  }
  return false
}

// 删除
function handleRemove(record: FileItem) {
  const index = fileListRef.value.findIndex((item) => item.uuid === record.uuid)
  index !== -1 && fileListRef.value.splice(index, 1)
  emit('delete', record)
}

// 预览
// function handlePreview(record: FileItem) {
//   const { thumbUrl = '' } = record;
//   createImgPreview({
//     imageList: [thumbUrl],
//   });
// }

async function uploadApiByItem(item: FileItem) {
  const { api } = props
  if (!api || !isFunction(api)) {
    return warn('upload api must exist and be a function')
  }
  try {
    item.status = UploadResultStatus.UPLOADING
    const { data } = await props.api?.(
      {
        data: {
          ...(props.uploadParams || {})
        },
        file: item.file,
        name: props.name,
        filename: props.filename
      },
      function onUploadProgress(progressEvent: ProgressEvent) {
        const complete = ((progressEvent.loaded / progressEvent.total) * 100) | 0
        item.percent = complete
      }
    )
    item.status = UploadResultStatus.SUCCESS
    item.responseData = data
    return {
      success: true,
      error: null
    }
  } catch (e) {
    console.log(e)
    item.status = UploadResultStatus.ERROR
    return {
      success: false,
      error: e
    }
  }
}

// 点击开始上传
async function handleStartUpload() {
  const { maxNumber } = props
  if ((fileListRef.value.length + props.previewFileList?.length ?? 0) > maxNumber) {
    return createMessage.warning(t('component.upload.maxNumber', [maxNumber]))
  }
  try {
    isUploadingRef.value = true
    // 只上传不是成功状态的
    const uploadFileList = fileListRef.value.filter((item) => item.status !== UploadResultStatus.SUCCESS) || []
    const data = await Promise.all(
      uploadFileList.map((item) => {
        return uploadApiByItem(item)
      })
    )
    isUploadingRef.value = false
    // 生产环境:抛出错误
    const errorList = data.filter((item: any) => !item.success)
    if (errorList.length > 0) throw errorList
  } catch (e) {
    isUploadingRef.value = false
    throw e
  }
}

//   点击保存
function handleOk() {
  if (fileListRef.value.length > props.maxNumber) {
    return createMessage.warning(t('component.upload.maxNumber', [props.maxNumber]))
  }
  if (isUploadingRef.value) {
    return createMessage.warning(t('component.upload.saveWarn'))
  }
  const fileList: string[] = []

  for (const item of fileListRef.value) {
    const { status, responseData } = item
    if (status === UploadResultStatus.SUCCESS && responseData) {
      fileList.push(responseData.url)
    }
  }
  // 存在一个上传成功的即可保存
  if (fileList.length <= 0) {
    return createMessage.warning(t('component.upload.saveError'))
  }
  fileListRef.value = []
  closeModal()
  emit('change', fileList)
}

// 点击关闭：则所有操作不保存，包括上传的
async function handleCloseFunc() {
  if (!isUploadingRef.value) {
    fileListRef.value = []
    return true
  } else {
    createMessage.warning(t('component.upload.uploadWait'))
    return false
  }
}
</script>
<style lang="less">
.upload-modal {
  .ant-upload-list {
    display: none;
  }

  .ant-table-wrapper .ant-spin-nested-loading {
    padding: 0;
  }

  &-toolbar {
    display: flex;
    align-items: center;
    margin-bottom: 8px;

    &__btn {
      margin-left: 8px;
      text-align: right;
      flex: 1;
    }
  }
}
</style>
